The book is intended for advanced players. Material is sorted into 5 main chapters titled Weaknesses, Pieces, Prophylaxis, Exercises a Solutions. All positions are explained in detail and deeply analysed. There are several hundreds samples in the book and most of them are from 2008-2012. Name index in the end. This is the second book of the series Grandmaster Preparation (Calculation, Positional Play, Strategic Play, Attack and Defence, Endgame Play, Thinking inside the Box). GM Jacob Aagaard is known as succesful trainer and writer. He has received the Guardian, ECF and ChessCafe Book of the Year awards and the FIDE Senior Trainer title. Further information about the book is available at qualitychess.co.uk